Isomerization of alk-2-enyl ethers
CA 2023565 A1 · Owner: Gaf Chemicals Corporation · Inventors: Plotkin, Jeffrey S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention is directed to a process for the isomerization of alk-2-enyl ethers to the corresponding alk-1-enyl ethers under anhydrous conditions by the use of a supported rare metal catalyst atomic number 44 or 45 which comprises contacting the allyl ether with between about 0.1 and about 20 wt. % of said supported catalyst in which the amount of rare metal with respect to support is between about 0.05 and about 10 wt. %.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed August 17, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 17, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 17, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.